:
DG has received honoraria for speaking from Medtronic, outside the submitted work. AAK is a consultant to Boston Scientific and has received honoraria for speaking from Medtronic, Boston Scientific and Abbott, also grants from Medtronic, all outside the submitted work. GHS has received honoraria for speaking from Medtronic, and Boston Scientific, outside the submitted work. AK has received honoraria for speaking from Medtronic and Abbott, outside the submitted work. LC and UK declare that they have no conflicts of interest.